meconium-stained amniotic fluid
Pronunciation: meh-KOH-nee-um
Amniotic fluid that appears green or brown due to the presence of fetal meconium. Indicates potential fetal distress and requires careful monitoring.
Full Definition
A condition in which the normally clear amniotic fluid becomes discolored (green, brown, or yellow) due to the passage of meconium (fetal stool) into the amniotic cavity. Meconium-stained amniotic fluid (MSAF) occurs in 10-15% of pregnancies and may indicate fetal hypoxia or stress, though it can also occur in post-term pregnancies without distress. The consistency is graded as thin, moderate, or thick, with thick meconium carrying higher risk for complications. The primary concern is meconium aspiration syndrome, which occurs when the fetus inhales meconium-stained fluid before, during, or after birth, potentially causing severe respiratory complications. Management includes continuous fetal monitoring and preparation for neonatal resuscitation.
Usage
Usage note: MSAF is acceptable abbreviation. Always describe consistency (thin, moderate, thick) as this affects clinical management.
In Context
- "Thick MSAF was noted upon rupture of membranes, prompting continuous fetal monitoring." — Labor and delivery note
- "The presence of meconium-stained amniotic fluid required pediatric team notification for delivery." — Delivery preparation documentation